Qweak Machine Protection and Personnel Protection Requirements
Machine Protection
(New)
System/Component
Protective
Device
Location
Nomenclature
Compton
(NEW)
CW BLM
CW BLM
CW BLM
CW BLM
Ion Chamber
Compton
Compton
Compton
Compton
Compton
3P01
3P02
3P03
3P04
Compton Electron
Detector
(NEW)
Tungsten Plug
System
Owner
SSG
SSG
SSG
SSG
SSG
B Vulcan
Water Flow
Flow switch
Notes
Hall A generates a trip if dipole
magnets are off and electron detector
not in garage position.
B Vulcan
Mirror FSD similar to Diffuser FSD
Exit Window
Raster
Water Flow
Flow switch
B Vulcan
NOTES:
1. How long for damage to occur? (G Smith - AI) (~1 msec – worst
case – rough calculation)
2. If greater than few seconds could use software solution such as
utilized for the target judges.
3. Dave Gaskell to generate Requirements Document.
4. Email on page 6 of this document detailing settings.
LIMIT RAMP RATE ON CURRENT. POTENTIAL FOR RAMPING
WITHOUT LOCK ON. NEED TO ADDRESS
Generate a FSD if:
1. Current > 10 μA CW (TBD)
AND:
2. Raster Lx and Ly less than
specified minimum and
maximum.
Raster FSD already looks at
raster currents.
Steve Lassiter to address current
threshold.
Qweak Machine Protection and Personnel Protection Requirements
Halo Target
Compton Vacuum Valves
HC
Two holes but bigger than used for G0.
G Marble will update girder
3P02A
3P02B
Manual Gate Valve
Other Vacuum Valves
Flow switches – Bill V – for plug and window
Bill
1. Gate Valve relay box
2. Flow Switches
3. Compton Box
.
Qweak Machine Protection and Personnel Protection Requirements
Personnel Protection
(New)
System/Component
Protective
Device
Gate Valve
PSS
R/S Box-PSS
Semi-Enclosed Huts
R/S Box-PSS
Ethane Sniffers
Target Motion
Location
1 fully
enclosed/locked
hut
Nomenclature
System
Owner
Notes
SSG
Arne approved method of protection.
R/S Box
For semi-enclosed hut
SSG
R/S Box
SSG
BV/JB
For semi-enclosed hut
Lights at entrance of hut
HC
In addition to vertical lifter, there will
be horizontal motion to be accounted
for.
Steps but no encoder. AI: G Smith
G Smith provided list of targets
Qweak Machine Protection and Personnel Protection Requirements
Machine Protection
(Existing)
System/Component
Ion Chambers
(Existing)
Protective
Device
Location
Transport
Pivot
Chicane
Target
Dump Entrance
Dump Left
Dump Right
H2 Sensor Chan A
Dump System
(Existing)
H2 Sensor Chan B
Water Flow
Diff Pressure
Supply Pressure
Supply Temp
Nomenclature
System
Owner
Notes
Greg Smith to determine locations
along with B Vulcan.
SSG
Dump
Integrator
Wait but involve Ops (Yan??)
Geoff Johnston is assuming Dump
System Integrator from Bob May
Geoff has a list of all system owners
and is updating.
Target Motion
Burn-Through Detector
Fast Raster
Lx, Ly Max and Min currents
Qweak Machine Protection and Personnel Protection Requirements
Machine Protection
(Existing)
System/Component
Protective
Device
Location
Nomenclature
System
Owner
Beam Loss Monitors
(Existing)
CW BLM
CW BLM
CW BLM
CW BLM
BLM
BLM
BLM
BLM
BLM
BLM
BLM
3C08 Girder
3C12 Girder
3C15 Girder
3H01 Girder
3C00 Girder
3C03 Girder
3C05 Girder
3C08 Girder
3C16 Girder
3C18 Girder
3C20 Girder
3C08
3C12A
3C15
3H01
3C00
3C03
3C05
3C08
3C16
3C18
3C20
SSG
Vacuum
Valves
EES
R Gonzales
H2 Sniffer
Target
Group
Notes
Diagnostic only
Diagnostic only
Diagnostic only
Diagnostic only
Diagnostic only
Diagnostic only
Diagnostic only
Existing: 3C00A, 3C07,3C15,
3C16,3C17,3C20A VCG3H00B
Qweak Machine Protection and Personnel Protection Requirements
FAST RASTER SETTING FOR QWEAK
Hi Pam Sorry to be so slow doing this calculation. I finally went over the latest fast raster positions from Jay's dimad. It turns out that the distance from the raster coils at
their new positions to the Qweak target is almost identical to the distance from their old positions to the Hall C normal target. The difference is only 2%.
If we want to be as precise as possible about setting the raster current, we would need to take the existing calibration and scale it down by a factor of 0.979. For
example,
I_raster_x = 0.979* (Old calibration constant in amps/mm)* (requested raster size in mm)
I should note that when we move into the 12 GeV era, things will need to change again since:
1. The distance from the raster coils will be now about 5 meters shorter and,
2. We will have 2 pairs of coils (2 "x" rasters and 2 "y" rasters).
But that is a problem for another day.
Cheers,
Dave
------------------------------------------------------Dave Gaskell
Endstation FSD Contact Sheet
2/23/2010
Qweak Machine Protection and Personnel Protection Requirements
Node
Signal
Contact
3H001
BLM 4313: ILM3H00
MPS EGR
3H001
Slow Raster
Bill Gunning
3H001
Fast Raster
Bill Gunning
3H001
Magnet Current Status
(HKS Exp.)
Vulcan or Beaufait
Jefferson Lab Suite 6
gaskelld@jlab.org
12000 Jefferson Ave.
OFFICE:(757)
269-6092
Newport News, VA 23606
PAGER: (757)
584-6092
Qweak Machine Protection and Personnel Protection Requirements
3H001
G0 Target
Greg Smith
3H003
HKS Vacuum Chassis
Rick Gonzales
3H002
Target Movement
Hall C
3H002
Hydrogen Sensor (No
Longer Exists)
Dave Meekins
3H002
UPS Software Crash
(No Longer Exists)
Dave Meekins
3H002
Right Dump IonC8
RADCON
3H002
Pre-Chicane IonC1
RADCON
3H002
Pivot IonC2
RADCON
3H002
Targer Exit IonC3
RADCON
3H002
IonC4
RADCON
3H002
Entrance L Dump
IonC5
RADCON
3H002
Entrance R Dump
IonC6
RADCON
Qweak Machine Protection and Personnel Protection Requirements
3H002
Left Dump IonC7
RADCON
3H002
H2 (No Longer Exists)
Dave Meekins
3H002
Diffuser
Walter Kellner
3H002
Scattering Chamber
Joe Beaufait
3H002
Burn-through detector
Rick Gonzales
3H002
Standard Target
Dave Meekins
BD002
H2 Sensor (Channel A)
Rick Gonzales
BD002
H2 Sensor (Channel B)
Rick Gonzales
BD002
Water Flow
Rick Gonzales
BD002
Differential Pressure
Rick Gonzales
BD002
Supply Pressure
Rick Gonzales
BD002
Supply Temperature
Rick Gonzales
Qweak Machine Protection and Personnel Protection Requirements
BD001
H2 Sensor (Channel A)
Rick Gonzales
BD001
H2 Sensor (Channel B)
Rick Gonzales
BD001
Water Flow
Rick Gonzales
BD001
Differential Pressure
Rick Gonzales
BD001
Supply Pressure
Rick Gonzales
BD001
Supply Temperature
Rick Gonzales